Hello and thank you for providing this forum. I am trying to figure out if a variable speed pump is right for my pool. The pool is 6600 gal, it has a C900 Hayward filter, Pentair 340038 1hp pump with Pentair Solartouch for the solar heat. I have gauges on the pump showing TDH @ 57' while heating and 45' when not. Looking at the curve for my pump that is about 40gpm, it is showing about 8.7 amps. My question is as I look at the curve for a variable speed pump, to get 57' of head the pump speed is not that much different. I do live in Florida but my wif likes the water really warm so the solar gets used a lot. I mainly want the variable speed to quiet things down. Any advice will be appreciated.